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tty: Clarify ldisc variable 

Rename o_ldisc to avoid confusion with the ldisc of the
'other' tty.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-06-15 07:04:49 -04:00 committed by Greg Kroah-Hartman
parent 36697529b5
commit 9fbfa34c18
1 changed files with 7 additions and 7 deletions
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14
drivers/tty/tty_ldisc.c
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@ -517,7 +517,7 @@ static void tty_ldisc_restore(struct tty_struct *tty, struct tty_ldisc *old)
int tty_set_ldisc(struct tty_struct *tty, int ldisc)
{
int retval;
struct tty_ldisc *o_ldisc, *new_ldisc;
struct tty_ldisc *old_ldisc, *new_ldisc;
struct tty_struct *o_tty = tty->link;
new_ldisc = tty_ldisc_get(tty, ldisc);
@ -543,7 +543,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
/* FIXME: why 'shutoff' input if the ldisc is locked? */
tty->receive_room = 0;
o_ldisc = tty->ldisc;
old_ldisc = tty->ldisc;
tty_lock(tty);
/* FIXME: for testing only */
@ -558,8 +558,8 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
return -EIO;
}
/* Shutdown the current discipline. */
tty_ldisc_close(tty, o_ldisc);
/* Shutdown the old discipline. */
tty_ldisc_close(tty, old_ldisc);
/* Now set up the new line discipline. */
tty->ldisc = new_ldisc;
@ -569,17 +569,17 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
if (retval < 0) {
/* Back to the old one or N_TTY if we can't */
tty_ldisc_put(new_ldisc);
tty_ldisc_restore(tty, o_ldisc);
tty_ldisc_restore(tty, old_ldisc);
}
/* At this point we hold a reference to the new ldisc and a
a reference to the old ldisc. If we ended up flipping back
to the existing ldisc we have two references to it */
if (tty->ldisc->ops->num != o_ldisc->ops->num && tty->ops->set_ldisc)
if (tty->ldisc->ops->num != old_ldisc->ops->num && tty->ops->set_ldisc)
tty->ops->set_ldisc(tty);
tty_ldisc_put(o_ldisc);
tty_ldisc_put(old_ldisc);
/*
* Allow ldisc referencing to occur again